Free online tool
HMAC Generator
Generate HMAC signatures with SHA-256 or SHA-512.
Updates automatically in your browser.
How to use this tool
- 1. Complete the fieldsEnter the required message, username, password or secret key.
- 2. Review the generated valueThe authorization header or signature updates automatically.
- 3. Copy the resultCopy the generated value when it is ready.
Frequently asked questions
Is the secret key uploaded?
No. The key and message are processed only by the browser cryptography API.
What is HMAC Generator designed to do?
Generate HMAC signatures with SHA-256 or SHA-512.
Is the output from HMAC Generator a complete security guarantee?
No. Treat it as a browser utility and apply the security review and policies required by your own system.
Should I use production secrets with HMAC Generator?
Use test or non-production values whenever possible, especially on shared or untrusted devices.
Tool guide
About HMAC Generator
What is HMAC Generator?
HMAC Generator is a free browser-based utility designed to generate hmac signatures with sha-256 or sha-512.
Security utilities support common tasks but do not replace complete security controls.
When to use HMAC Generator
Use this tool for a quick result without installing a separate application.
Review important results in the destination system.
Practical tips
Check the input format before relying on the result.
Keep a copy of important original data.
Privacy and processing
This tool is designed to process its working input in your browser.
Avoid confidential material on an untrusted device.
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